Internal network--------USG5120--------Public network
When sslvpn client connect with sslvpn server, IE explorer need to install a Microsoft cetification. If failed to install, ip address could not be obtained. Other succeeded to install, some computer still could not use sslvpn.
Do the test as follow:
1. Set the security level of IE is low.
2. Shut down the firewall and anti-virus software of user’s computer
If the problem still exists, high security level isn’t the reason. And do the next test as follow:
Right click “my computer”, left click properties and left click “device manager”.
In the menu view, left click “show hidden devices”.
Expand “network adapter”, if “Adapter v1.0” exists, uninstall it.
Problem is solved.
Problems are happened in Virtual network adapter of sslvpn client